Again that theory is simply false, since adding a 7th entity also increases durability. If they aim was to increase damage they would a weapon upgrade.
Yes, people have suggested weapon upgrade for years now.
Firstly relic and now modders do literally everything in their power to avoid it, because reasons.
7th man was implemented and guess what?
Modders themselves are now discussing possibility of giving that upgrade an additional DPS boost, because clearly and empirically proven, both over last years and in this very mod, durability alone without any bite gets them nowhere.
Now, they don't need LMG42 level of DPS increase, but they most certainly need DPS scaling more then durability scaling, especially in late game, where its NOT small arms that decimate them, but prolonged engagements with a lot of explody stuff involved.
If one increase DPS one simply run the risk of bring back conscript spam.
I'll share a little secret with you:
ANY change that will make cons a viable choice will bring back con spam. There are MULTIPLE commanders who are DEDICATED to spamming cons. Con spam is most certainly very intended since day 1.
Now, how exactly is that a bad thing again?
Its a faction that IS DESIGNED to SPAM one type of infantry and then supplement it with what's needed later.
You know what happened when con spam was killed?
Maxim spam happened.
You know what happened when maxim spam was killed?
Guard spam happened.
You know what happened when guards were briefly killed?
Maxim spam returned.
You know what happened when maxim was again killed?
Penal spam happened.
The faction is MADE to spam select type of infantry, just like OKW is meant to spam volks.